<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise API - race</title>
</head>
<body>
    <script>



       function sleep(ms) {
            var start = Date.now()
            while(Date.now() - start <= ms ) ; 
       }


        let p1 = new Promise((resolve, reject) => {
            setTimeout(() => {
                resolve('OK');
            }, 0);
        })
        let p2 =  (() => {
            sleep(3000)
            return Promise.resolve('Success');
        })()

        
        let p3 = Promise.resolve('Oh Yeah');

        //调用
        const result = Promise.race([p1, p2, p3]);

        console.log(result);

        result.then(value => {
            console.log('value', value) ;
        }, error => {
            console.log('error => ', error) ;
        })
    </script>
</body>

</html>